question_answer 1)

Predict which of the following will have appreciable concentration of reactants and products? (a) \[C{{l}_{2}}(g)\rightleftharpoons 2Cl(g);{{K}_{c}}=5\times {{10}^{-39}}\] (b)\[C{{l}_{2}}(g)+2NO(g)\rightleftharpoons 2NOCl(g);\,\,\,{{K}_{c}}=3.7\times {{10}^{8}}\] (c)\[C{{l}_{2}}(g)+2N{{O}_{2}}(g)\rightleftharpoons 2N{{O}_{2}}Cl(g);\,\,\,\,{{K}_{c}}=1.8\]

Answer:

(c) \[C{{l}_{2}}(g)+2N{{O}_{2}}(g)\rightleftharpoons 2N{{O}_{2}}Cl(g);\,\,\,\,{{K}_{c}}=1.8\] Equilibrium constant \[{{K}_{c}}\] lies between \[{{10}^{-3}}\]to \[{{10}^{3}}\] hence it will have appreciable concentration of reactants and products.